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Type: Artigo de periódico
Title: The Influence Of Magnetic And Electric Coupling Properties On The Magnetocaloric Effect In Quantum Paraelectric Eutio 3
Author: Von Ranke P.J.
Alho B.P.
Nobrega E.P.
De Sousa V.S.R.
Alvarenga T.S.T.
Carvalho A.M.G.
De Oliveira N.A.
Abstract: We report on the magnetic and magnetocaloric effect calculations in antiferromagnetic perovskite-type EuTiO 3. From the isothermal magnetic entropy change calculated upon low magnetic field changes (below 1 T) several results were predicted: inverse magnetocaloric effect, latent heat associated to spin AFM-FM reorientation transition and a temperature interval (controlled by magnetic field) where the EuTiO 3 does not change heat in an isothermic process. The magnetocaloric effect described through magnetic entropy change was correlated with magnetocapacitance formula. The theoretical investigation was carried out using a Heisenberg Hamiltonian considering the G-type antiferromagnetic structure with exchange interactions, in mean field approximation, between nearest-neighbor and next-nearest-neighbor magnetic Eu 2 ions. © 2011 Elsevier B.V. All rights reserved.
Rights: fechado
Identifier DOI: 10.1016/j.jmmm.2011.11.037
Date Issue: 2012
Appears in Collections:Unicamp - Artigos e Outros Documentos

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